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Agata [3.3K]
3 years ago
12

Problem Page The price of a notebook was $3.90 yesterday. Today, the price fell to $3.40 . Find the percentage decrease. Round y

our answer to the nearest tenth of a percent.
Mathematics
2 answers:
OleMash [197]3 years ago
6 0
Always find the difference in prices first. 
<span>3.45 - 3.20 = $.25 difference </span>

<span>Always divide the difference by the original price. Change this number into a per cent. </span>
<span>.25/3.45 = .07246 = 7.2% decrease </span>
nexus9112 [7]3 years ago
5 0
The percentage that 3.90 to 3.40 droped is -13%
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Answer:

Let x be the discounting price of a surfing lessons per person

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x + y = 130--------------(i)

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25x + 30y = 3650--------------(ii)

We solve for y using equ (i):

y = 130 - x ------------(iii)

Substitute equ (iii) to equ (ii) and solve for x

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-5x = -250

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y = 130 - 50

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